When tackling a significant wood cutting occupation, little is more irritating than having the blades, or teeth, on your own chain saw always jumping from the bar. The issue may be with your bar or it could be with your chain. Regardless of what caused your chain to jump the bar, you’ll need to rectify the problem or your hardwood cutting job will not get done.
Improper Chain Tension
You can extend the life span of your chain, bar and chain saw motor by keeping the appropriate amount of pressure on the chain. Too much slack on your chain can create the saw blades to leap the bar. This is often referred to as throwing the chain. Even when your chain saw isn’t throwing its chain, the tension may not be right. The RenTrain site recommends utilizing the dime method for testing tension. Place a dime between the chain and bar, then increase the tension until the chain is snug against the dime. Remove the dime and you’re ready to cut.
Worn Bar Heel
The saw blades travel across the bar at around 40 mph, which obviously has the effect of wearing down the bar. As the heels of the bar — the part of the bar closest the drive sprocket — bend down, the space the saw blades come out of the bar grooves when they travel across the sprocket increases. As that space increases, so does your chain’s instability and the more likely it is to jump the bar. Your choices are limited to replacing the bar, or possibly removing a chain link and running a shorter sequence.
Bar Rails at Poor Condition
Your chain saw’s bar requires a lot of abuse, not only from the chain spinning around at high rates, but occasionally from cutting to the bottom, or getting knocked around in the back of a pickup truck or just from being in the wrong place at the wrong time when felling a Tree Removal prices Littleton, CO. If the bar rails get damaged, the drive links in the chain are not able to slide smoothly across the bar and can cause the blades to leap the bar.
Worn Out Drive Sprocket
The drive sprocket is the mechanism that propels the saw blades to the chain around the bar. If the sprocket becomes considerably worn down, it will be impossible to keep proper chain tension, which will end in your chain saw throwing its chain. Other items that cause the saw blades to jump the bar comprise improper chain lubrication, a disengaged tension adjuster and the guide bar not being correctly propagated in place.